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Displacement Diffuser
QV / QH / QR
Ferdinand Schad KG
Steigstraße 25-27
D-78600 Kolbingen
Phone +49 (0) 74 63 - 980 - 0
Fax +49 (0) 74 63 - 980 - 200
info@schako.de
www.schako.de
Displacement Diffuser QV / QH / QR
Contents
Description ........................................................................................................................................ 3
Construction .............................................................................................................................................................................. 3
Model ......................................................................................................................................................................................... 3
Accessories ................................................................................................................................................................................ 3
Smoke test.................................................................................................................................................................................. 3
Models and dimensions ......................................................................................................................... 4
Dimensions ................................................................................................................................................................................ 4
Dimensions of accessories ......................................................................................................................................................... 5
Technical data .................................................................................................................................... 6
Pressure loss and noise level ..................................................................................................................................................... 6
Maximum end velocity of jet .................................................................................................................................................... 11
Temperature ratios.................................................................................................................................................................... 17
Legend ........................................................................................................................................... 27
Order details .................................................................................................................................... 27
Specification texts .............................................................................................................................. 28
03/01 - 2
Construction subject to change.
Version: 2015-03-25
No return possible!
Displacement Diffuser QV / QH / QR
Description
Accessories
The SCHAKO displacement diffuser is ideal for industrial plants
and laboratories which produce large amounts of hazardous
substances. The supply air enters the room at a low velocity with
a temperature difference of max -4 K in the cooling mode. The
low-induction flow displaces the contaminated air. If the displacement diffusers are used at floor level, the supply air
spreads out across the floor and is directed upwards by the convection flow from heat sources. When using displacement diffusers,
the return air should be as high as possible. Make sure to distribute the displacement diffusers evenly over the whole floor
surface area, to ensure effective floor flushing.
Especially in the presence of hazardous substances of high specific gravity, the displacement diffuser can also be used in the
occupied zone at a height of 3-4 metres. In these cases, the return air should be evacuated at floor level to about 50%.
The displacement diffuser is available as either the quarter cylinder type QV for installation in corners (90 throw), the half cylinder type QH for wall and column mounting (180 throw), or the
cylindrical type QR for mid-room installation (360 throw). The
housing of the displacement diffuser consists of a perforated
sheet faceplate, a base and a connection piece made of sheet
steel. A filter pocket is fitted inside to ensure an even flow across
the whole surface area. The filter pocket cleans the supply air
and ensures
a completely uniform intake of fresh air over the entire diffuser
area of the grille. The perforated faceplate can easily be removed
to change the filter pocket.
The diagrams are only valid until the supply air meets a heat
source due to laws of physics.
To simplify system regulation, a throttling element including a
measuring sensor or a hit-and-miss damper including a measuring sensor, can be installed at the connection pipe of the displacement diffuser to adjust the air volume.
Rubber lip seal (-GD)
- Special rubber
Throttling element (-DV)
- Sheet steel
Smoke test
Displacement diffuser type QH ø 600, L = 750
Cooling mode
VZU
=
900 m3/h (resp. 250 l/s)
ΔTO
=
-4 K
Construction
Connection pipe
- Galvanised sheet steel
Base plate
- Galvanised sheet steel
Filter pocket
- Synthetic fibre class G2
Faceplate
- Perforated sheet, galvanised
Attention: cannot be supplied in the aluminium version
Model
QV
QH
QR
- 90° throw, for installation in corners
- 180° throw, for installation on walls or columns
- 360° throw, for mid-room installation
03/01 - 3
Construction subject to change.
Version: 2015-03-25
No return possible!
Displacement Diffuser QV / QH / QR
Models and dimensions
Dimensions
QV, 90 ° throw
QH, 180° throw
QR, 360 ° throw
1.)
1.)
1.)
Available sizes
Size
250
300
400
450
500
600
650
700
830
1000
ød
158
198
248
298
313
398
448
498
628
628
Detail Y
øD
250
300
400
450
500
600
650
700
830
1000
T
248
293
368
418
450
543
593
643
773
858
Spot-welded
L
500
750
1000
1250
1500
2000
QR all sizes in 2 pieces around the circumference
Depending on the size, the length is in one or two pieces (see p.
5)
1.) ring with toggle-type fastener
Filter can be replaced by opening the toggle-type fastener
03/01 - 4
Construction subject to change.
Detail Z
Version: 2015-03-25
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Displacement Diffuser QV / QH / QR
1-part
2-part
Dimensions of accessories
Rubber lip seal (-GD)
Detail Q
Throttling element (-DV)
Size
250
300
400
450
500
600
650
700
830
1000
Detail X
Size
250
300
400
450
500
600
650
700
830
1000
ød
158
198
248
298
313
398
448
498
628
628
L
1-part
500-1000
500-1000
500-2000
500-2000
500-2000
500-1250
500-1250
500-1250
500-1250
500-1250
2-part
>1000-2000
>1000-2000
>1250-2000
>1250-2000
>1250-2000
>1250-2000
>1250-2000
03/01 - 5
Construction subject to change.
Version: 2015-03-25
No return possible!
Displacement Diffuser QV / QH / QR
Technical data
Pressure loss and noise level
QR NW250, L=1000 mm
QR NW300, L=1000 mm
750
1000
KF (-)
x 1.9
x 1.45
x1
L (mm)
500
750
1000
1250
1500
2000
x 2.08
x 1.6
x 1.1
x 0.95 x 0.81
x 0.7
500
750
1000
1250
2000
KF (-)
L (mm)
KF (-)
1250
1500
2000
x 0.87 x 0.74 x 0.64
1500
x 2.26 x 1.73 x 1.19 x 1.03 x 0.88 x 0.76
Correction factor for volumetric flow
QR
500
QH
L (mm)
QV
QV
QH
QR
Correction factor for pressure loss
03/01 - 6
Construction subject to change.
L (mm)
KF (-)
L (mm)
KF (-)
L (mm)
KF (-)
500
750
x 0.74 x 0.87
500
750
x 0.65 x 0.78
500
750
1000
x1
1250
1500
2000
x 1.02 x 1.04
x 1.1
1000
1250
2000
x 0.9
x 0.92 x 0.94 x 0.99
1000
1250
1500
1500
2000
x 0.61 x 0.73 x 0.84 x 0.86 x 0.88 x 0.97
Version: 2015-03-25
No return possible!
Displacement Diffuser QV / QH / QR
Correction factor for pressure loss
Correction factor for volumetric flow
750
1000
KF (-)
x 1.9
x 1.45
x1
L (mm)
500
750
1000
1250
1500
2000
x 2.08
x 1.6
x 1.1
x 0.95 x 0.81
x 0.7
KF (-)
L (mm)
KF (-)
500
750
1000
1250
1500
2000
x 0.87 x 0.74 x 0.64
1250
1500
2000
x 2.26 x 1.73 x 1.19 x 1.03 x 0.88 x 0.76
QH
500
QV
QH
QV
L (mm)
QR
QR NW450, L=1000 mm
QR
QR NW400, L=1000 mm
03/01 - 7
Construction subject to change.
L (mm)
KF (-)
L (mm)
KF (-)
L (mm)
KF (-)
500
750
x 0.74 x 0.87
500
750
x 0.65 x 0.78
500
750
1000
1500
2000
x 1.02 x 1.04
x 1.1
1000
1250
2000
x 0.9
x 0.92 x 0.94 x 0.99
1000
1250
x1
1250
1500
1500
2000
x 0.61 x 0.73 x 0.84 x 0.86 x 0.88 x 0.97
Version: 2015-03-25
No return possible!
Displacement Diffuser QV / QH / QR
Correction factor for pressure loss
Correction factor for volumetric flow
750
1000
x 1.9
x 1.45
x1
L (mm)
500
750
1000
1250
1500
2000
x 2.08
x 1.6
x 1.1
x 0.95 x 0.81
x 0.7
500
750
1000
1250
2000
KF (-)
L (mm)
KF (-)
1250
1500
2000
x 0.87 x 0.74 x 0.64
1500
x 2.26 x 1.73 x 1.19 x 1.03 x 0.88 x 0.76
QH
500
KF (-)
QV
QH
QV
L (mm)
QR
QR NW600, L=1000 mm
QR
QR NW500, L=1000 mm
03/01 - 8
Construction subject to change.
L (mm)
KF (-)
L (mm)
KF (-)
L (mm)
KF (-)
500
750
x 0.74 x 0.87
500
750
x 0.65 x 0.78
500
750
1000
1500
2000
x 1.02 x 1.04
x 1.1
1000
1250
2000
x 0.9
x 0.92 x 0.94 x 0.99
1000
1250
x1
1250
1500
1500
2000
x 0.61 x 0.73 x 0.84 x 0.86 x 0.88 x 0.97
Version: 2015-03-25
No return possible!
Displacement Diffuser QV / QH / QR
Correction factor for pressure loss
Correction factor for volumetric flow
750
1000
KF (-)
x 1.9
x 1.45
x1
L (mm)
500
750
1000
1250
x 2.08
x 1.6
x 1.1
x 0.95 x 0.81
x 0.7
500
750
1000
1250
2000
KF (-)
L (mm)
KF (-)
1250
1500
2000
x 0.87 x 0.74 x 0.64
1500
1500
2000
x 2.26 x 1.73 x 1.19 x 1.03 x 0.88 x 0.76
QH
500
QV
QH
QV
L (mm)
QR
QR NW700, L=1000 mm
QR
QR NW650, L=1000 mm
03/01 - 9
Construction subject to change.
L (mm)
KF (-)
L (mm)
KF (-)
L (mm)
KF (-)
500
750
x 0.74 x 0.87
500
750
x 0.65 x 0.78
500
750
1000
1500
2000
x 1.02 x 1.04
x 1.1
1000
1250
2000
x 0.9
x 0.92 x 0.94 x 0.99
1000
1250
x1
1250
1500
1500
2000
x 0.61 x 0.73 x 0.84 x 0.86 x 0.88 x 0.97
Version: 2015-03-25
No return possible!
Displacement Diffuser QV / QH / QR
Correction factor for pressure loss
Correction factor for volumetric flow
750
KF (-)
x 1.9
x 1.45
x1
L (mm)
500
750
1000
1250
1500
2000
x 2.08
x 1.6
x 1.1
x 0.95 x 0.81
x 0.7
500
750
1000
1250
2000
KF (-)
L (mm)
KF (-)
1000
1250
1500
2000
x 0.87 x 0.74 x 0.64
1500
x 2.26 x 1.73 x 1.19 x 1.03 x 0.88 x 0.76
QH
500
QV
QH
QV
L (mm)
QR
QR NW1000, L=1000 mm
QR
QR NW830, L=1000 mm
03/01 - 10
Construction subject to change.
L (mm)
KF (-)
L (mm)
KF (-)
L (mm)
KF (-)
500
750
x 0.74 x 0.87
500
750
x 0.65 x 0.78
500
750
1000
x1
1250
1500
2000
x 1.02 x 1.04
x 1.1
1000
1250
2000
x 0.9
x 0.92 x 0.94 x 0.99
1000
1250
1500
1500
2000
x 0.61 x 0.73 x 0.84 x 0.86 x 0.88 x 0.97
Version: 2015-03-25
No return possible!
Displacement Diffuser QV / QH / QR
Maximum end velocity of jet
QV ø 400
Diagrams are valid up to a mounting height of 0.25 m from the
bottom edge of the displacement diffuser.
Isothermal L = 750
Correction factor for length
L
(mm)
KF (-)
500
750
1.2
1.0
1000 1250 1500 2000
0.9
0.81
0.73
0.66
x (m) = x750 (m) x KF
Correction factor for cooling
ΔTO (K)
KF
(-)
-1
-2
-3
-4
1.15
1.3
1.4
1.5
xcooling (m) = xisothermal (m) x KF
QV ø 250
QV ø 450
QV ø 300
QV ø 500
03/01 - 11
Construction subject to change.
Version: 2015-03-25
No return possible!
Displacement Diffuser QV / QH / QR
QV ø 600
QV ø 830
QV ø 1000
QV ø 650
QH ø 250
QV ø 700
03/01 - 12
Construction subject to change.
Version: 2015-03-25
No return possible!
Displacement Diffuser QV / QH / QR
QH ø 300
QH ø 500
QH ø 600
QH ø 400
QH ø 650
QH ø 450
03/01 - 13
Construction subject to change.
Version: 2015-03-25
No return possible!
Displacement Diffuser QV / QH / QR
QH ø 700
QR ø 250
QH ø 830
QR ø 300
QH ø 1000
QR ø 400
03/01 - 14
Construction subject to change.
Version: 2015-03-25
No return possible!
Displacement Diffuser QV / QH / QR
QR ø 450
QR ø 650
QR ø 700
QR ø 500
QR ø 600
QR ø 830
03/01 - 15
Construction subject to change.
Version: 2015-03-25
No return possible!
Displacement Diffuser QV / QH / QR
QR ø 1000
03/01 - 16
Construction subject to change.
Version: 2015-03-25
No return possible!
Displacement Diffuser QV / QH / QR
Temperature ratios
Diagrams are valid up to a mounting height of 0.25 m from the bottom edge of the displacement diffuser.
QV ø 250
QV ø 300
QV ø 400
03/01 - 17
Construction subject to change.
Version: 2015-03-25
No return possible!
Displacement Diffuser QV / QH / QR
QV ø 450
QV ø 500
QV ø 600
03/01 - 18
Construction subject to change.
Version: 2015-03-25
No return possible!
Displacement Diffuser QV / QH / QR
QV ø 650
QV ø 700
QV ø 830
03/01 - 19
Construction subject to change.
Version: 2015-03-25
No return possible!
Displacement Diffuser QV / QH / QR
QV ø 1000
QH ø 250
QH ø 300
03/01 - 20
Construction subject to change.
Version: 2015-03-25
No return possible!
Displacement Diffuser QV / QH / QR
QH ø 400
QH ø 450
QH ø 500
03/01 - 21
Construction subject to change.
Version: 2015-03-25
No return possible!
Displacement Diffuser QV / QH / QR
QH ø 600
QH ø 650
QH ø 700
03/01 - 22
Construction subject to change.
Version: 2015-03-25
No return possible!
Displacement Diffuser QV / QH / QR
QH ø 830
QH ø 1000
QR ø 250
03/01 - 23
Construction subject to change.
Version: 2015-03-25
No return possible!
Displacement Diffuser QV / QH / QR
QR ø 300
QR ø 400
QR ø 450
03/01 - 24
Construction subject to change.
Version: 2015-03-25
No return possible!
Displacement Diffuser QV / QH / QR
QR ø 500
QR ø 600
QR ø 650
03/01 - 25
Construction subject to change.
Version: 2015-03-25
No return possible!
Displacement Diffuser QV / QH / QR
QR ø 700
QR ø 830
QR ø 1000
03/01 - 26
Construction subject to change.
Version: 2015-03-25
No return possible!
Displacement Diffuser QV / QH / QR
Legend
VZU
Δpt
ρ
LWA
x
KF
vmax
TV
ΔTO
(m³/h) [l/s]
(Pa)
(kg/m³)
[dB(A)]
(m)
(-)
(m/s)
(-)
(K)
=
=
=
=
=
=
=
=
=
ΔTX
L
tZU
tR
(K)
(mm)
(°C)
(°C)
=
=
=
=
Supply air volume
Pressure loss
Density
A-weighted sound power level
Horizontal throw
Correction factor
Maximum end velocity of jet
Temperature ratio (TV = ΔTX / ΔTO )
Temperature difference between supply air
temperature and room temperature (ΔTO =
tZU - tR)
Temperature difference at point x
Length
Supply air temperature
Room temperature
Order details
Displacement Diffuser
for corner installation
90° throw
QV
for walls and columns
180° throw
QH
for mid-room installation
360° throw
QR
Accessories:
Throttling element
-DV
Rubber lip seal
-GD
Order example:
QR-450x750-GD
Unless stated otherwise, the thick-frame model will be delivered!
03/01 - 27
Construction subject to change.
Version: 2015-03-25
No return possible!
Displacement Diffuser QV / QH / QR
Specification texts
Displacement diffuser with removeable perforated faceplate for
easy cleaning according to VDI 6022.
Suitable for low-turbulence supply air introduction at low throw
velocity. Consisting of a base, front casing and round connection pipe from the top made of galvanised sheet steel. To
achieve even air distribution, a removable synthetic fibre filter
fleece, alternatively a perforated plate pyramid made of perforated sheet steel, is installed. The displacement diffuser can also be
provided with a high-quality powder coating in the RAL colour
9010 (white) or in a different RAL colour.
- Type QV, 90° throw, for corner installation
Product: SCHAKO type QV
- Type QH, 180° throw, for wall and column installation
Product: SCHAKO type QH
- Type QR, 360° throw, for mid-room installation
Product: SCHAKO type QR
Accessories:
- Rubber lip seal (-GD), made of special rubber.
- With additional throttling element (-DV) for easy air volume
regulation
03/01 - 28
Construction subject to change.
Version: 2015-03-25
No return possible!